Microwave-assisted steam distillation with simultaneous liquid/liquid extraction of pentachlorophenol from organic wastes and soils - Research portal of Justus Liebig University Giessen:

Journal article

Microwave-assisted steam distillation with simultaneous liquid/liquid extraction of pentachlorophenol from organic wastes and soils

Authors list: Düring, RA; Zhang, XL; Hummel, HE; Czynski, J; Gäth, S

Publication year: 2003

Pages: 584-588

Journal: Analytical and Bioanalytical Chemistry

Volume number: 375

Issue number: 4

ISSN: 1618-2642

eISSN: 1618-2650

DOI Link: https://doi.org/10.1007/s00216-002-1729-5

Publisher: Springer

Abstract:
An efficient method for extracting pentachlorophenol (PCP) from organic solid matrices and soils using direct excitation of the fresh samples by microwave energy is presented. Steam-volatile PCP partitioned into the organic solvent n-hexane within the closed extraction vessel, resulting in recovery rates of 85-92% from aged samples. Condensed water provided a boundary layer between extract and sample thus preventing any contact of PCP with and re-partitioning into the sample. Duration of the microwave-assisted process was 35 min. Crude extracts were derivatized by heptafluorobutyric anhydride (HFBA) to improve selectivity and sensitivity resulting in detection limits of 1-2 mug kg(-1). GC-MS/MS analyses proved that suitable extracts with only minor impurities were obtained. Common sample treatment steps like drying, thorough grinding, frequent transferring, and tedious clean-up, and concentration procedures which all can cause certain losses of analyte were minimized. The efficiency of the method was verified by comparison with an established ultrasonic extraction procedure. This microwave-assisted pressurized steam distillation with simultaneous partition into an organic phase thus provides a streamlined and efficient strategy which requires no additional investment in standard equipment for microwave-assisted extractions (MAE). Degradation of analytes at longer extraction times must be taken into account.

Citation Styles

Harvard Citation style: Düring, R., Zhang, X., Hummel, H., Czynski, J. and Gäth, S. (2003) Microwave-assisted steam distillation with simultaneous liquid/liquid extraction of pentachlorophenol from organic wastes and soils, Analytical and Bioanalytical Chemistry, 375(4), pp. 584-588. https://doi.org/10.1007/s00216-002-1729-5

APA Citation style: Düring, R., Zhang, X., Hummel, H., Czynski, J., & Gäth, S. (2003). Microwave-assisted steam distillation with simultaneous liquid/liquid extraction of pentachlorophenol from organic wastes and soils. Analytical and Bioanalytical Chemistry. 375(4), 584-588. https://doi.org/10.1007/s00216-002-1729-5